Certain problems in the theory of closet approximation

[1] JACKSON D, 1931, B AM MATH SOC, V37, P69

[2] Jackson D, 1921, T AM MATH SOC, V22, P117

[3] Note on a class of polynomials of approximation [J]. TRANSACTIONS OF THE AMERICAN MATHEMATICAL SOCIETY, 1921, 22 (1-4) : 320 - 326

[4] Jackson D, 1924, T AM MATH SOC, V26, P133

[5] Polya G, 1913, CR HEBD ACAD SCI, V157, P840

[6] SHOTHAT J, 1925, B AM MATH SOC, V31, P509

[1] JACKSON D, 1931, B AM MATH SOC, V37, P69

[2] Jackson D, 1921, T AM MATH SOC, V22, P117

[3] Note on a class of polynomials of approximation [J]. TRANSACTIONS OF THE AMERICAN MATHEMATICAL SOCIETY, 1921, 22 (1-4) : 320 - 326

[4] Jackson D, 1924, T AM MATH SOC, V26, P133

[5] Polya G, 1913, CR HEBD ACAD SCI, V157, P840

[6] SHOTHAT J, 1925, B AM MATH SOC, V31, P509